\begin{tikzpicture}[>=Stealth, scale=0.5]
    \foreach \y in {0,...,6}
        \foreach \x [parse=true] in {1,...,10-\y}
            \draw (\x+0.5*\y,0.9*\y) circle (0.5cm) circle (0.4cm);
\end{tikzpicture}
